this little clock be great , if you have the right mattress . I get it about a month ago , and since then be lucky enough to get a new mattress . my old one be thinner and you basic ` come with the bed set ' stuff , and the little sonic boom get I up in a jiffy . my new mattress be very thick , and the boom only cause a gentle buzz that be pretty easy to ignore . so , it do it be job if you have the right bed for it . also , the light of the clock face be bright ; if you be a light sleeper you will not enjoy it . I end up drape a thin scarf over it to dull it a bit . with all that say it be still a reliable clock that be very cute and unique .